摘要: |
We describe experiments and results of four of the potentially nearest term means to realize a cooperative collision avoidance system, which we regard as either a supplement to or a simple replacement of present single vehicle-based systems. Experiments for each ranged from laboratory tests only (fluorescent paint), field tests only (roadside-mounted corner cubes), and a combination of laboratory and field tests (passive license plates, light emitting diode brake light messaging). These technologies all focus on improving the signal-to-noise ratio of a collision avoidance sensor. The LED brakelight messaging and passive license plates increase the signal, by making it easier to detect real vehicles on the roadway (and, in the case of LED brakelight messaging, to provide information on the trajectory of that vehicle). Corner Cubes serve to mark clutter, such as bridge abutments or overpasses, that cannot be moved. Fluorescent paint serves to improve the recognition of the lane markings, for localization. We believe that experimental results point toward further proof-of-concept refinements, but in general, that these systems potentially represent technologically sound cooperative vehicle-roadway components and that indeed, “sensor friendly” systems, when put to the test, can eventually translate into significant benefit in terms of lives saved. |